.bgone{
    width: 100%;
    height: 100%;
    position: absolute;
    top:0;right: 0;left: 0;bottom: 0;margin: auto;
}
.pic{
    width: 492px;
    height: auto;
    position: absolute;
    top:173px;right: 453px;left: 0;bottom: 0;margin: auto;
    z-index: 99999;
}